Adjustable school-desk.



H. HARRIS. ADJUSTABLE SCHOOL DESK. APPLICATION FILED NOV. 1, 1912.

Patented Oct. 21, 1913.

COLUMBIA PLANOGRAPH C0,. WASHINGTON. D. c.

UNIT

I-IIBAM HARRIS, OF MINNEAPOLIS, MINNESOTA.

ADJUSTABLE SCHOOLJJESK.

To all whom it may concern:

Be it known that I, HmAM HARRIS, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Adjustable School-Desks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to adjustable school desks of the single pedestal type, and has for its object to provide improved means for adjusting and securing the seat and desk at different elevations, in respect to each other and in respect to the floor.

The invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a View in side elevation illustrating my invention; Fig. 2 is an enlarged horizontal section taken on the line 00 50 on Fig. 1; Fig. 3 is a vertical section taken through the pedestal and certain of the parts on the line m m on Fig. 2, some parts being broken away, and the said parts being shown on the same scale as on Fig. 1; and Fig. 4: is a vertical section showing the upper end portion of the pedestal, with section on the same line as Fig. 3 on an enlarged scale.

The numeral 1 indicates a tubular pedestal having a flanged base 2 that is adapted to be screwed or otherwise rigidly secured to the floor.

The numeral 3 indicates the desk and the numeral 1 the seat or chair, which parts, respectively, are rigidly secured to the projecting arms of supporting brackets 5 and 6, respectively, which brackets have large sleeves mounted to slide vertically on the pedestal 1. Hitherto, substantially the construction so far described has been employed without the mechanical means for raising and lowering the seat and desk, but with set screws provided in the sleeves of the brackets for rigidly securing the same whenever set on the pedestal.

My invention provides an extremely simple and highly eflicient means concealed within the pedestal, for raising and lowering Specification of Letters Patent.

Application filed November 1, 1912.

Patented Get. 21, 1913.

Serial No. 729,081.

the desk and seat supporting brackets and for holding the same wherever set. Hence, in accordance with my invention, the pedestal 1 is provided with diametrically opposite longitudinal slots 7 and 8, the former of which extends approximately from the top down to the central portion thereof, and the latter of which extends approximately from the center of the pedestal nearly to the bottom thereof. The desk supporting bracket 5 is provided with a nut block 9 located within the pedestal with its neck portion working in the slot 7, and likewise, the seat supporting bracket 6 is provided with a nut block 10, the neck of which works in the slot 8. Screwed into the upper end of the pedestal 1 is a cap or plug 11.

The numerals l2 and 13 indicate a pair of screw-threaded slots that have threaded engagement, respectively, with the nut blocks 9 and 10. The upper ends of these adjusting slots 12 and 13 are swiveled in the plug 11 and are provided with angular heads 1%, and with stop nuts or collars 15 located above the said block. By means of a single wrench applied to the heads 14, the adjusting slots 12 and 13 may be rotated so as to raise and lower the desk and the seat or chair. The block or cap 11 affords a base of reaction for the screws 12 and 13, necessary to adapt them to hold the desk and seat in diiferent vertical adj ustments. Obviously, with these adjusting screws, the desk and seat will remain wherever adjusted and no other locking means is required. By means of these adjusting screws, the seat and desk may be very easily adjusted to the desired height, and this may be accomplished with ease when a child or person is seated on the chair 1. The obvious advantage of adjusting the chair with the child or person seated thereon, is to get, readily, the exact proper adjustment for the particular child or person. The numeral 16 indicates the outer cap or cover which is screwthreaded onto the upper end of the pedestal 1 and when applied, serves to cover the angular heads 14 of the adjusting screws so that they cannot be tampered with, and furthermore, gives a neatness of appearance to the upper end of the pedestal.

The device is of comparatively small cost and is neat in appearance, since the adjusting devices are concealed within the pedestal.

What I claim is:

1. The combination with a tubular rigid pedestal having diametrically opposite up per and lower longitudinally extended slots, of a plug seated in the upper end of said pedestal, desk and seat supporting brackets having sleeves working telescopically on said pedestal. and provided with nut blocks projecting, respectively, through said upper and lower slots and into the interior of said pedestal, a desk and seat supported, respectively, by said brackets, and parallel desk and seat adjusting screws swiveled to said cap, depending within said pedestal eccentric to the axis thereof, said screws engaging, respectively, with the nut blocks of said desk and seat supporting brackets.

2. The combination with a tubular rigid pedestal. l'iaving diametrically opposite upper and lower longitudinally extended slots, of a plug seated in the upper end of said pedestal, desk and seat supporting brackets having sleeves working telescopically on sa1d pedestal and provlded with nut blocks projecting, respectively, through said upper M and lower slots and into the interior of said pedestal, a desk and seat supported, respectively, by said brackets, and parallel desk and seat adjusting screws swiveled to said cap, depending within said pedestal eccentric to the axis thereof, said screws engaging, respectively, with the nut blocks of said deskand seat supporting brackets, the said adjusting screws having angular heads located above said plug, and a cap applied to upper end of said pedestal. andv normally covering the angular head of said screws.

In testimony whereof I afi ix my signature in presence of two witnesses.

HIRAM HARRIS.

lVitnesses BERNlOE G. VVHEIJLER, HARRY D. KILsonn.

Copies of. this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

